| Message ID | 20230725183939.2741025-2-fan.ni@samsung.com |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Enabling DCD emulation support in Qemu | expand |
On Tue, 25 Jul 2023 18:39:55 +0000 Fan Ni <fan.ni@samsung.com> wrote: > From: Fan Ni <nifan@outlook.com> > > Based on CXL spec 3.0 Table 8-94 (Identify Memory Device Output > Payload), dynamic capacity event log size should be part of > output of the Identify command. > Add dc_event_log_size to the output payload for the host to get the info. > > Signed-off-by: Fan Ni <fan.ni@samsung.com> > --- > hw/cxl/cxl-mailbox-utils.c | 6 +++++- > 1 file changed, 5 insertions(+), 1 deletion(-) > > diff --git a/hw/cxl/cxl-mailbox-utils.c b/hw/cxl/cxl-mailbox-utils.c > index ad7a6116e4..b013e30314 100644 > --- a/hw/cxl/cxl-mailbox-utils.c > +++ b/hw/cxl/cxl-mailbox-utils.c > @@ -21,6 +21,8 @@ > #include "sysemu/hostmem.h" > > #define CXL_CAPACITY_MULTIPLIER (256 * MiB) > +/* Experimental value: dynamic capacity event log size */ It's got to have some value. Not sure why this is 'experimental'. As such I would drop the comment as not helpful. > +#define CXL_DC_EVENT_LOG_SIZE 8 > > /* > * How to add a new command, example. The command set FOO, with cmd BAR. > @@ -519,8 +521,9 @@ static CXLRetCode cmd_identify_memory_device(struct cxl_cmd *cmd, > uint16_t inject_poison_limit; > uint8_t poison_caps; > uint8_t qos_telemetry_caps; > + uint16_t dc_event_log_size; > } QEMU_PACKED *id; > - QEMU_BUILD_BUG_ON(sizeof(*id) != 0x43); > + QEMU_BUILD_BUG_ON(sizeof(*id) != 0x45); > > CXLType3Dev *ct3d = container_of(cxl_dstate, CXLType3Dev, cxl_dstate); > CXLType3Class *cvc = CXL_TYPE3_GET_CLASS(ct3d); > @@ -543,6 +546,7 @@ static CXLRetCode cmd_identify_memory_device(struct cxl_cmd *cmd, > st24_le_p(id->poison_list_max_mer, 256); > /* No limit - so limited by main poison record limit */ > stw_le_p(&id->inject_poison_limit, 0); > + stw_le_p(&id->dc_event_log_size, CXL_DC_EVENT_LOG_SIZE); > > *len = sizeof(*id); > return CXL_MBOX_SUCCESS;
diff --git a/hw/cxl/cxl-mailbox-utils.c b/hw/cxl/cxl-mailbox-utils.c index ad7a6116e4..b013e30314 100644 --- a/hw/cxl/cxl-mailbox-utils.c +++ b/hw/cxl/cxl-mailbox-utils.c @@ -21,6 +21,8 @@ #include "sysemu/hostmem.h" #define CXL_CAPACITY_MULTIPLIER (256 * MiB) +/* Experimental value: dynamic capacity event log size */ +#define CXL_DC_EVENT_LOG_SIZE 8 /* * How to add a new command, example. The command set FOO, with cmd BAR. @@ -519,8 +521,9 @@ static CXLRetCode cmd_identify_memory_device(struct cxl_cmd *cmd, uint16_t inject_poison_limit; uint8_t poison_caps; uint8_t qos_telemetry_caps; + uint16_t dc_event_log_size; } QEMU_PACKED *id; - QEMU_BUILD_BUG_ON(sizeof(*id) != 0x43); + QEMU_BUILD_BUG_ON(sizeof(*id) != 0x45); CXLType3Dev *ct3d = container_of(cxl_dstate, CXLType3Dev, cxl_dstate); CXLType3Class *cvc = CXL_TYPE3_GET_CLASS(ct3d); @@ -543,6 +546,7 @@ static CXLRetCode cmd_identify_memory_device(struct cxl_cmd *cmd, st24_le_p(id->poison_list_max_mer, 256); /* No limit - so limited by main poison record limit */ stw_le_p(&id->inject_poison_limit, 0); + stw_le_p(&id->dc_event_log_size, CXL_DC_EVENT_LOG_SIZE); *len = sizeof(*id); return CXL_MBOX_SUCCESS;